What Is an Expansion Valve in a Car? | Cold Air Control Explained
An A/C expansion valve meters refrigerant into the evaporator, dropping pressure so the cabin air cools and dehumidifies. If your car’s A/C ever feels icy for a minute, then turns lukewarm, a small part may be calling the shots. That part is the expansion valve. It sits in the refrigerant line right before the evaporator […]
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